Pneumatic action for organs



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I. BA S-SETT.

PNEUMATIC ACTION FOR ORGANS.

d Aug. 14, 1888. ("L

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UNITED STATES PATENT OFFICEQ IRA BASSETT, OF CHICAGO, ILLTNOTS.

PNEUMATIC ACTION FOR ORGANFS.

SPECIFICATION forming part of Letters Patent No. 387,84e6, dated August14, 3 888.

Application filed May 8, 1888.

To all whom it may concern.-

Be it known that l, IRA BASSEIT, of Chicago, in the county of Cook andState of Illinois, have invented a certain new, useful, and ImprovedPneumatic Action for Organs, of which the following is a full, clear,and exact description, reference being had to the accompanying drawings,forming apart of this specification, in which Figure 1 is a longitudinalvertical sectional view of a portion of an air-box having one ofmyimproved pneumatic bellows therein, which is represented as being inits normal position; Fig. 2 is a like sectional view of said bellows asthe same appears when collapsed. Fig. 3 is a rear end View of thebellows, showing the means of supporting the same from the rear. Fig. 4is a plan view, in detail, of the front end of said bellows, showing thefront side of the air-box in section with the escape-port therein. Fig.5 is a vertical sectional view, in detail, of a portion of said bellows,showing the valve as it appears when partially raised from its seat; andFig. 6 is a longitudinal sectional View of a modified or inflation formof bellows.

Like letters of reference in the different figures designate like parts.

The object of my invention is to provide a pneumatic action for organswhich shall be simple, durable, and compact in its construe tion, whileit is noiseless and rapid in its operation, and which may be easilyremoved or taken apart for repairs.

To this end my invention consists in the arrangement and combination ofelements, as hereinafter more particularly described, and definitelypointed out in the claims.

Referring to the drawings, A, Fig. 1, represents the air-box of myimproved pneumatic action, while A is the wind-trunk leading theretofrom the main bellows.

B B, with the leather folds b glued thereto in the usual way, constitutethe pneumatic bellows, the part B being hinged at 11. Bigidly secured tothe heel of the bellows is an offset, 0, having a channel, 0, formedtherein, which coincides with an opening, a, in the front side of theair-box. To the parts B and 0, respectively, are glued blocks c, whichare in turn rigidly secured, preferably, to the interior of the box A bymeans of screws. The bellows are placed one above the other in SerialNo. 273,264. (No lllfi'iil.)

planes inclined slightly from the perpendicular, as shown in Fig. b, soas to permit of the adjustment of the trackers D l), which areconnected, respectively, with the valves in the organ wind-chest andwith the parts B of the bellows by means of projecting arms I)", rigidlyattached thereto. To the parts B are also rigidly secured blocks 2')",which project slightly beyond the ends of the parts B and are providedwith notches b In the rear of each tier of bellows is placed a rigidbar, E, which is removably attached to the airbox, and in turn securedto the blocks 1) by means of dags c, which project later ally therefrom,and are inserted within the notches If, so that the rear end of thebellows. upon which thestrain of the tracker is exerted,

is rigidly and firmly supported by means of supports, which, it isobvious, maybe readily removed in case it is necessary to repair thebellows. Between the parts BandOis formed a partition, F, having anopening, f, formed therein, which communicates with a channel, B in thepart B. A circular opening, B is also formed in the part B, which ispartially covered by means of an annular diaphragm, G, of leather orother flexible material,which is removably secured above the opening Bby means of a ring, G, of metal or other suitable material.

H is a valve-stem, from one end of which projects a wire, h, whichpasses through the end of a lever, J, which is pivoted to a stud, j. Atracker, K, serves to connect said lever with the organ-keyin the usualway. Aspring, L, operating in a slot formed in apost, L, for thepurp0se.of preventing lateral movement, is connected with the oppositeend of said valve-stem, preferably in the manner shown in Fig. 2. Saidvalve-stem is thus retained in a central position with relation to theopen ings 3 Upon said valve-stem are mounted valves H H", the former ofwhich is faced with leather in the usual way, and is normally held toits seat over the openings f by means of the spring L, and is unseatedby means of a press ure upon the orgairkey which operates the le ver J.

To prevent the bellows from making a clap ping noise when actuated, Iform an opening, m, in the part B, which is covered by means of a pieceof leather or felt, in, which is normally retained against the openingby means of a spring, M, rigidly attached to said part B. A set-screw,N, having a wooden block, it, upon its end, is secured in the part Boppo- 5 site the opening m, so that the block a may be brought intocontact with the end of the spring M when the latteris brought forwardin its movement, and thus open the valve. The position of said block maybe adjusted at will by means of said screw.

To prevent the puffing noise so common in pneumatics, which results fromthe escape of air through the eduction-channel upon the depression of akey, I taper the opening (till the manner shown in Fig. 4, so that it issmaller at the outside. This permits the air to escape without noise.

The operation of said pneumatic is as follows: The air in the wind-chestA being constantly under pressure and the valve H being normally openthe pressure is the same within as without the bellows, and it isnormally distended, as shown in Fig. 1. Upon depressing a key the valveH is unseated, and the air from the bellows, which is being compressed,

flows out through the channel 0. At the same time the pressure withinthe air-box depresses the diaphragm G to meet the valve H", as

shown in Fig. 5. This action of the diaphragm o greatly increases therapidity with which the bellows may be operated. As the the bellows iscollapsed, the block a is brought into contact with the spring M, whichuncovers and admits the air through the opening m. This forms anair-cushion, which prevents a total collapse of the bellows and rendersthe action noiseless. The openingfis cut away at f to afi'ord a. moredirect passage of air, and,as the thin disk forming the valve H offersbut lit- 1,0 tle obstruction to the entrance of a r when the valve isunseated, the rapidity of the action greatly exceeds that of the deviceshere toiore in use for a like purpose.

In Fig. 6 I have shown an inflation pneir matic constructed upon a likeprinciple. In

that case the conditions are simply reversed. The bellows are invertedand placed outside of the air-box A, the openings f and B are betweenthe valves H H, the air enters the channel 0 and exhausts through theopening B and the spring M is within the bellows, while the block a iswithout.

Among others my improved pneumatic pre sents the advantages of beingreadily and easily removed from the air box and of being firmlysupported therein while in use. Upon removing the screws which hold thering G the diaphragm G and valves may be taken out without injury to anyof the parts.

The construction of my pneumatic and the means shown for sustaining thevalves therein enable them to be placed very compactly and to occupyless space than similar devices heretofore constructed.

Having thus described my invention, I claim- 1. The combination, withthe valve H, of the flexible diaphragm G and means, as the ring G, forremovably securing the same in place, substantially as shown anddescribed.

2. The eombinatiomwith the openingf and diagphragm G, of the doublevalves H H springL, and slotted post L, substantially as shown anddescribed.

3. In a pneumatic action for organs, the combination, with the chamber0, of the out let a, the width of which is gradually decreased in aregular taper from the width ofsaid chamher until the end of the outletis reached, whereby the air may be noiselessly expelled, substantiallyas shown and described.

4. The combination, with a pneumatic bellows, of the opening m, valveon, spring M, set-screw N, and block 01, whereby the extent to which thebellows is permitted to collapse may be regulated and adjusted to meetthe requirements ofthe valvesin the main wind-chest and air may beadmitted to the bellows to serve as an air-cushion until the valve m isclosed. substantially as shown and described.

5. The combination, with a series of pneumatic bellows, of the blocksIf, attached rigidly to said bellows, notches b bars E, and (lags e,substantially as shown and described.

In testimony whereof I have signed this 9 5 specification, in thepresence of two subscribing witnesses, this 4th day of May, 1888.

IRA BASSE'IT.

IVitnesses:

l). H. FLETCHER, J. B. HALPENNY.

